A gas always spreads out to fill all available space.
True or False
Science Hw

Answer: becuase----Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. ... It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass.

Explanation: hope i helped c:

ANSWER:

STEP-BY-STEP EXPLANATION:

We have the following:

• Electromagnetic waves are waves that can travel through the vacuum of outer space. Mechanical waves, unlike electromagnetic waves, require the presence of a material medium in order to transport their energy from one place to another.

• Waves (electromagnetic and mechanical) can transfer energy over long distances since they do not need to move matter the entire distance.

• Radiation is the transfer of energy through electromagnetic waves

Knowing the above, we can match the concepts as follows:

The net current through circuit is 0.1 A and directed in clockwise way.

The total currents, accounting for current direction, are referred to as the "net current." The net current is 4 mA out if a node is sending 1 mA in and 5 mA out. According to KCL, the total of all incoming currents must equal the total of all outgoing currents. The total current is equal to the total voltage divided by the total resistance according to Ohm's Law.

The total current in a parallel circuit is only equal to the individual current in that branch of the circuit, whereas it is the same through all of the components in a series circuit.

Net current through circuit i = V / Ri

= (9 - 6) / (10 + 20)i = 0.1 A

Directed in clockwise way

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What are the magnitude and direction of the current in the 20 Ω resistor in (Figure 1)?

Express your answer with the appropriate units. Enter positive value if the current is clockwise and negative value if the current is counterclockwise.

Answer:

i don't really know the exact answer but i would say something like earthquakes or steam/excessive heat

Explanation:

Answer:

Geothermal energy can be trapped using geothermal plants that utilizes steam escaping from the earth surface to make electricity.

The limitations include :

Explanation:

Geothermal energy originates in form of heat/steam escaping from the inner parts of the earth surface. The steam trapped is converted to electricity through turbines. The hot water pumped by heat pumps can be used to heat homes or for heating purposes in industries.

The limitations of geothermal energy are high initial capital costs for installing the systems, depletion of geothermal sites after sometime, environmental concerns due to greenhouse gases emissions and land requirements for geothermal projects.

The traffic light controller chip has an operating frequency of 500 MHz, static power consumption of 26.28 mW, dynamic power consumption of 1.70625 mW, and a total power dissipation of 27.98625 mW.

(i) To calculate the chip's operating frequency, we need to find the inverse of the critical path delay. Given that the critical path of the chip is 0.002μs, the operating frequency can be calculated as:

Operating Frequency = 1 / Critical Path Delay

= 1 / 0.002μs

= 500 MHz

Therefore, the chip's operating frequency is 500 MHz.

(ii) Static power refers to the power dissipated by a chip when it is in a static or idle state. It is independent of the switching activity. The static power consumption can be calculated as the product of the chip's area utilization, sub-threshold leakage current, and supply voltage:

Static Power = Area Utilization × Sub-threshold Leakage Current × Supply Voltage

= 50 mm^2 × 584 mA × 0.9 V

= 26.28 mW

Therefore, the static power of the chip is 26.28 mW.

(iii) Dynamic power refers to the power dissipated by a chip due to the switching activity of its transistors. It can be calculated as the product of the chip's switching capacitance, activity factor, and the square of the supply voltage:

Dynamic Power = Switching Capacitance × Activity Factor × Supply Voltage^2

= 500 pF/mm^2 × 15/64 × (0.9 V)^2

= 1.70625 mW

Therefore, the dynamic power of the chip is 1.70625 mW.

(iv) Total power dissipation is the sum of static power and dynamic power. Hence, the total power dissipation of the chip can be calculated as:

Total Power Dissipation = Static Power + Dynamic Power

= 26.28 mW + 1.70625 mW

= 27.98625 mW

Therefore, the total power dissipation of the chip is 27.98625 mW.

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Here's the neat, cool way to convert units like this:

-- 1 kilogram  =  1,000 grams

-- 1 meter  =  100 centimeters

So . . . . .

(1000 kg/m³) x (1000 g/kg) x (1 m/100 cm)³ =

(1,000 kg/m³) x (1,000 g/kg) x (1 m³/1,000,000 cm³) =

(1,000 x 1,000 x 1 / 1,000,000) (kg-g-m³ / m³-kg-cm³)  =  1 g/cm³

Answer:

is

Explanation:

e

The net vertical force on the balloon, when it is let go, is: Net force = Buoyant force - Weight of rubber = 0.034 N (upward) - 0.011 N (downward) = 0.023 N (upward). So the balloon will experience a net upward force of 0.023 N when it is let go.

The buoyant force on the 2.90 L helium balloon can be calculated using the formula:
Buoyant force = density of fluid x volume of displaced fluid x acceleration due to gravity
The density of air at sea level is approximately 1.2 kg/m³. Converting the volume of the balloon to m³, we get:
2.90 L = 0.00290 m³
So the buoyant force on the balloon is:
Buoyant force = 1.2 kg/m³ x 0.00290 m³ x 9.81 m/s² = 0.034 N (upward)
Next, we need to calculate the weight of the rubber in the balloon:
Weight of rubber = mass of rubber x acceleration due to gravity
The mass of rubber is given as 1.10 g. Converting this to kg and using the value of acceleration due to gravity as 9.81 m/s², we get:
Weight of rubber = 0.00110 kg x 9.81 m/s² = 0.011 N (downward)
Therefore, the net vertical force on the balloon when it is let go is:
Net force = Buoyant force - Weight of rubber = 0.034 N (upward) - 0.011 N (downward) = 0.023 N (upward)

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Explanation:

a.)

Reactants : CO2 (carbondioxide) + H2O (water)

Products : O2 (oxygen) + C6H12O6 (glucose)

b.)

Reactants: Na ( Solid Hydrogen) + H2O (water)

Products: H2 (hydrogen gas) + NaOH (sodium hydroxide)

Answer: Science is involved in cooking, eating, breathing, driving, playing, etc. The fabric we wear, the brush and paste we use, the shampoo, the talcum powder, the oil we apply, everything is the consequence of advancement of science. Life is unimaginable without all this, as it has become a necessity.

Explanation:

Answer:

Science is at work in almost every part of our lives from the computer we use to the foods that we consume. For example take the yellow corn that we are use to eating it is actually a result of bio-agriculture.

Explanation:

Given:

The height through which the box was lifted, h=6 m

The time it took to lift the box, t=3 s

The power dissipated in lifting the box, P=400 W

To find:

The weight of the box.

Explanation:

The power is described as the time rate of transfer of energy.

Thus the power is given by,

Where W is the work done in lifting the box.

The work done is given by,

Where F is the weight of the box.

Thus the power dissipated in lifting the box is given by,

On substituting the known values,

Final answer:

The weight of the box is 200 N

Thus the correct answer is option A.

Answer:

Explanation:

The gravitational potential energy of a body can be found by using the formula

GPE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

GPE = 200 × 9.8 × 30 = 58,800

We have the final answer as

Hope this helps you

Answer:

Explanation:

To find the distance covered by the dolphin , we use the formula

From the question

velocity = 17 m/s

time = 3600 s

We have

distance = 17 × 3600

We have the final answer as

Hope this helps you

Given data:

* The current through the system is I = 3 A.

* The resistance of resistors connected in parallel is,

Solution:

The equivalent resistance of the system is,

Substituting the known values,

By taking inverse value,

According to Ohm's law, the voltage across the battery is,

Substituting the known values,

Thus, the voltage across the battery is 11.25 volts.

The capacitive resistance in a 120 nf capacitor used in a standard 120 volt ac circuit with a frequency of 60hz is 26.53 ohms.

Capacitive resistance is a type of impedance that opposes the flow of alternating current in a circuit.

It is calculated using the formula Xc = 1 / (2πfC), where Xc is the capacitive reactance, f is the frequency of the alternating current, and C is the capacitance of the capacitor.
In this case, the capacitance is 120 nf, the frequency is 60hz, and using the formula, we get Xc = 1 / (2π x 60 x 120 x 10^-9) = 26.53 ohms.

Hence, the capacitive resistance in a 120 nf capacitor used in a standard 120 volt ac circuit with a frequency of 60hz is 26.53 ohms, which is calculated using the formula Xc = 1 / (2πfC).

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The wavelength of the radio waves produced by the oscillating electrons is approximately 560 meters.  Understanding the relationship between frequency and wavelength is crucial in analyzing electromagnetic waves and their propagation.

To find the wavelength of the radio waves produced, we can use the formula:

wavelength = speed of light / frequency

Given:

Frequency = 535,000 Hz

The speed of light in a vacuum is approximately 3.00 x 10^8 meters per second.

Using the formula, we can calculate the wavelength:

wavelength = (3.00 x 10^8 m/s) / (535,000 Hz)

= 560 meters

Therefore, the wavelength of the radio waves produced by the oscillating electrons is approximately 560 meters.

By using the formula for wavelength and the given frequency, we calculated that the wavelength of the radio waves produced by the oscillating electrons is approximately 560 meters. The calculation involves dividing the speed of light by the frequency. Understanding the relationship between frequency and wavelength is crucial in analyzing electromagnetic waves and their propagation.

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To find the equation of motion for a spring mass oscillator with a mass of 1 kg, a damping constant of 10.6, and a spring constant of 21.33, we'll use the following terms in the explanation: oscillator, motion, and explanation.

Step 1: Identify the parameters of the oscillator.
Mass (m) = 1 kg
Damping constant (b) = 10.6
Spring constant (k) = 21.33

Step 2: Write down the general equation of motion for a damped spring mass oscillator.
The equation of motion for a damped spring mass oscillator is given by:

m * a(t) + b * v(t) + k * x(t) = 0

where a(t) is the acceleration, v(t) is the velocity, and x(t) is the displacement of the oscillator at time t.

Step 3: Substitute the given values into the equation of motion.
1 * a(t) + 10.6 * v(t) + 21.33 * x(t) = 0

This is the equation of motion for the given spring mass oscillator with the specified parameters.

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The reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

Given that the mass of a person is 60.0 kg and the elevator accelerates upwards with an acceleration of 4.90 m/s², we have to determine the reading on the scale.

Let F be the force exerted by the scale on the person. Then, by Newton's second law of motion, the net force acting on the person is Fnet= m * a

where m = 60.0 kg is the mass of the person and a = 4.90 m/s² is the acceleration of the elevator. Hence, the net force acting on the person is given by;

Fnet = 60.0 kg * 4.90 m/s²

Fnet = 294.0 N

Therefore, the scale reading is equal to the force exerted by the scale on the person. Since the elevator is accelerating upwards, the force exerted by the scale on the person is greater than the weight of the person, which is the force of gravity acting on the person.

The force of gravity acting on the person is given by;

Fg = m * g, where g = 9.81 m/s² is the acceleration due to gravity. Hence, the force of gravity acting on the person is given by;

Fg = 60.0 kg * 9.81 m/s²Fg = 588.6 N

Therefore, the scale reading is given by the sum of the force of gravity acting on the person and the net force acting on the person;

F = Fg + Fnet

F = 588.6 N + 294.0 N

F = 882.6 N

Thus, the reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

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Positive acceleration speeds the object up. Negative acceleration, aka deceleration, slows the object down. Zero acceleration means the object either keeps the same speed or isn't moving at all (we can say the speed is 0).

When an object speeds up, the positive acceleration occurs.

The acceleration is the time rate of change of velocity.

a = dv /dt

If the velocity is increased, the acceleration also increases, time remains same to cover a fixed distance.
Speeding up the object means positive acceleration.  Negative acceleration also called deceleration slows the speed. Zero acceleration represents that the object is moving with constant velocity.

Thus, the positive acceleration occurs.

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After then, the meteorite accelerates quickly to achieve its terminal speed, which is between 200 and 400 miles per hour (90 to 180 meters per second).

The meteorite then swiftly reaches its final velocity, which is between 200 and 400 miles per hour (90 to 180 meters per second). The terminal velocity is the speed at which the acceleration caused by gravity is precisely cancelled out by the deceleration caused by atmospheric drag.

Researchers first classify the sort of rock in their investigation before dating the meteorite to ascertain its origin. Nakhla indicated that it originated 1.3 billion years ago, a significant amount of time after the majority of other meteorites, which date from the Solar system's creation, 4.56 billion years ago.

Meteorites are priced and sold by the gram because they are so rare. Price is influenced by a number of factors, including demand, scarcity, supply, specimen size, specimen quality, and preparation effort. The average cost per gram of a common iron meteorite is between US$0.50 and US$5.00.

Therefore, the correct answer is option d) a typical meteorite's weight, surface area, and coefficient of drag.

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Answer:

positive acceleration.

Explanation:

As its slowing down gradually, its positive acceleration. When the ball slows down, its acceleration vector is in the opposite direction of its motion. Therefore positive acceleration.

Explanation:

by inches to centimeter u can convert to meters

This is not a gamma radiation because there is a change in the atomic number of the daughter nucleus. It is rather a beta decay.

We have to note that when we talk about a decay we are talking about the manner that we can be able to break up the atom of a radioactive substance so that we can be able to produce a new substance.

We can see now that what we have here is the loss of a beta ray or an electron from the specie that is shown. This is evidenced by the change in the atomic number of the daughters nucleus.

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Answer:

(a) 1.054 m/s²

(b) 1.404 m/s²

Explanation:

0.5·m·g·cos(θ) - μs·m·g·(1 - sin(θ))  - μk·m·g·(1 - sin(θ))  = m·a

Which gives;

0.5·g·cos(θ) - μ·g·(1 - sin(θ)   = a

Where:

m = Mass of the of the block

μ = Coefficient of friction

g = Acceleration due to gravity = 9.81 m/s²

a = Acceleration of the block

θ = Angle of elevation of the block = 20°

Therefore;

0.5×9.81·cos(20°) - μs×9.81×(1 - sin(20°)  - μk×9.81×(1 - sin(20°) = a

(a) When the static friction μs = 0.610  and the dynamic friction μk = 0.500, we have;

0.5×9.81·cos(20°) - 0.610×9.81×(1 - sin(20°)  - 0.500×9.81×(1 - sin(20°) = 1.054 m/s²

(b) When the static friction μs = 0.400  and the dynamic friction μk = 0.300, we have;

0.5×9.81·cos(20°) - 0.400×9.81×(1 - sin(20°)  - 0.300×9.81×(1 - sin(20°) = 1.404 m/s².

Answer:

1.) Displacement = 32.08m

2.) Velocity = 55km/h

3.) Acceleration = 94.29 km/h^2

Explanation:

Given that the train takes 35 minutes to cover the distance between the two towns. The train's average speed is 55 kilometers per hour. That is,

Time t = 35 minute

Convert it to hours by dividing it by 60

35/60 = 7/12 hours

Speed = 55 km/h

The displacement of the car is:

Displacement = 55 × 7/12 = 32.08 m

The velocity of the car will be 55 km/h

The acceleration of the car will be:

Acceleration = velocity/time

Substitute velocity and time into the formula

Acceleration = 55 ÷ 7/12

Acceleration = 94.29 km/h^2

The mass of the object attached to the spring is approximately 0.119 kg.

To determine the mass of the attached object using the spring, we can utilize Hooke's Law, which states that the force exerted by a spring is directly proportional to the displacement of the spring from its equilibrium position.

Hooke's Law can be expressed as:

F = k * x

Where:

F is the force exerted by the spring,

k is the spring constant, and

x is the displacement of the spring from its equilibrium position.

The frequency of the spring's motion (f) can be related to the mass (m) and the spring constant (k) using the equation:

f = (1 / (2π)) * √(k / m)

Rearranging this equation, we can solve for the mass:

m = (k / (4π² * f²))

Given:

Spring constant (k) = 3 N/m

Frequency (f) = 0.8 Hz

Substituting these values into the equation, we get:

m = (3 N/m) / (4π² * (0.8 Hz)²)

Calculating this expression:

m ≈ 0.119 kg

Therefore, the mass of the object attached to the spring is approximately 0.119 kg.

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The mass attached to the spring is approximately 0.238 kg.

To find the mass attached to the spring, we can use the formula for the angular frequency (ω) of a mass-spring system:

ω = √(k / m),

where ω is the angular frequency, k is the spring constant, and m is the mass.

Given:

k = 3 N/m (spring constant),

f = 0.8 Hz (frequency).

First, let's convert the frequency from Hz to radians per second (rad/s):

ω = 2πf = 2π(0.8) ≈ 5.03 rad/s.

Now, we can solve the formula for m:

ω = √(k / m),

m = k / ω^2,

m = 3 N/m / (5.03 rad/s)^2.

Calculating the value:

m ≈ 3 N/m / (5.03 rad/s)^2 ≈ 0.238 kg.

Therefore, the mass attached to the spring is approximately 0.238 kg.

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Answer:

Since (average) acceleration = (change in velocity)/(time it takes), the car's acceleration = (100 km/h)/(10 s) = 10 km/h/s. This means that, on the average, the car's velocity changed by 10 km/h each second.

Explanation:

Answer:

A. New problem or discovery Engineering solution Development Research Explanation:

A possible  sequence of steps in the research and development cycle are  A. New problem or discovery Engineering solution Development Research​. In the  research and development cycle, the first step is the problem that a scientist observe. After that we have discover a solution for that problem through many research so the above materials are the possible sequence of steps in the research and development cycle.